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Extend key code handling

This commit is contained in:
Přemysl Eric Janouch 2013-05-18 22:26:57 +02:00
parent 583b19c6e4
commit ec57f2d806
1 changed files with 147 additions and 57 deletions
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204
src/sdtui.c
View File

@ -41,27 +41,39 @@
#include "stardict.h"
#define KEY_SOH 1 /**< Ctrl-A */
#define KEY_ENQ 5 /**< Ctrl-E */
#define KEY_VT 11 /**< Ctrl-K */
#define KEY_FF 12 /**< Ctrl-L */
#define KEY_NAK 21 /**< Ctrl-U */
#define KEY_ETB 23 /**< Ctrl-W */
#define KEY_SOH 1 //!< Ctrl-A
#define KEY_STX 2 //!< Ctrl-B
#define KEY_ENQ 5 //!< Ctrl-E
#define KEY_ACK 6 //!< Ctrl-F
#define KEY_VT 11 //!< Ctrl-K
#define KEY_FF 12 //!< Ctrl-L
#define KEY_SO 14 //!< Ctrl-N
#define KEY_DLE 16 //!< Ctrl-P
#define KEY_NAK 21 //!< Ctrl-U
#define KEY_ETB 23 //!< Ctrl-W
#define KEY_RETURN 13 /**< Enter */
#define KEY_ESCAPE 27 /**< Esc */
#define KEY_RETURN 13 //!< Enter
#define KEY_ESCAPE 27 //!< Esc
// These codes may or may not work, depending on the terminal
// They lie above KEY_MAX, originally discovered on gnome-terminal
#define KEY_CTRL_UP 565
#define KEY_CTRL_DOWN 524
#define KEY_CTRL_LEFT 544
#define KEY_CTRL_RIGHT 559
typedef enum {
TERMINAL_UNKNOWN, //!< No extra handling
TERMINAL_XTERM, //!< xterm and VTE extra keycodes
TERMINAL_RXVT //!< rxvt extra keycodes
} TerminalType; //!< Type of the terminal
#define KEY_ALT_UP 563
#define KEY_ALT_DOWN 522
#define KEY_ALT_LEFT 542
#define KEY_ALT_RIGHT 557
typedef enum {
KEY_NOT_RECOGNISED, //!< Not recognised
KEY_CTRL_UP, //!< Ctrl + Up arrow
KEY_CTRL_DOWN, //!< Ctrl + Down arrow
KEY_CTRL_LEFT, //!< Ctrl + Left arrow
KEY_CTRL_RIGHT, //!< Ctrl + Right arrow
KEY_ALT_UP, //!< Alt + Up arrow
KEY_ALT_DOWN, //!< Alt + Down arrow
KEY_ALT_LEFT, //!< Alt + Left arrow
KEY_ALT_RIGHT //!< Alt + Right arrow
} ExtraKeyCode; //!< Translated key codes above KEY_MAX
#define _(x) x /**< Fake gettext, for now. */
@ -87,6 +99,58 @@ struct curses_event
MEVENT mouse;
};
/** Translate key codes above KEY_MAX returned from ncurses into something
* meaningful, based on the terminal type. The values have been obtained
* experimentally. Some keycodes make ncurses return KEY_ESCAPE, even
* depending on actual terminal settings, thus this is not reliable at all.
* xterm/VTE seems to behave nicely, though.
*/
static guint
translate_extra_keycode (wchar_t code, TerminalType terminal)
{
switch (terminal)
{
case TERMINAL_XTERM:
switch (code)
{
case 565: return KEY_CTRL_UP;
case 524: return KEY_CTRL_DOWN;
case 544: return KEY_CTRL_LEFT;
case 559: return KEY_CTRL_RIGHT;
case 563: return KEY_ALT_UP;
case 522: return KEY_ALT_DOWN;
case 542: return KEY_ALT_LEFT;
case 557: return KEY_ALT_RIGHT;
}
break;
case TERMINAL_RXVT:
switch (code)
{
case 521: return KEY_CTRL_UP;
case 514: return KEY_CTRL_DOWN;
}
break;
case TERMINAL_UNKNOWN:
break;
}
return KEY_NOT_RECOGNISED;
}
/** Get the type of the terminal based on the TERM environment variable. */
static TerminalType
get_terminal_type (void)
{
const gchar *term = g_getenv ("TERM");
if (!term) return TERMINAL_UNKNOWN;
gchar term_copy[strcspn (term, "-") + 1];
g_strlcpy (term_copy, term, sizeof term_copy);
if (!strcmp (term_copy, "xterm")) return TERMINAL_XTERM;
if (!strcmp (term_copy, "rxvt")) return TERMINAL_RXVT;
return TERMINAL_UNKNOWN;
}
// --- Application -------------------------------------------------------------
/** Data relating to one entry within the dictionary. */
@ -103,22 +167,23 @@ struct view_entry
struct application
{
GIConv utf8_to_wchar; //!< utf-8 -> wchar_t conversion
GIConv wchar_to_utf8; //!< wchar_t -> utf-8 conversion
TerminalType terminal_type; //!< Type of the terminal
GIConv utf8_to_wchar; //!< utf-8 -> wchar_t conversion
GIConv wchar_to_utf8; //!< wchar_t -> utf-8 conversion
StardictDict *dict; //!< The current dictionary
StardictDict * dict; //!< The current dictionary
guint32 top_position; //!< Index of the topmost dict. entry
guint top_offset; //!< Offset into the top entry
guint selected; //!< Offset to the selected definition
GPtrArray *entries; //!< ViewEntry's within the view
guint32 top_position; //!< Index of the topmost dict. entry
guint top_offset; //!< Offset into the top entry
guint selected; //!< Offset to the selected definition
GPtrArray * entries; //!< ViewEntry's within the view
gchar *search_label; //!< Text of the "Search" label
GArray *input; //!< The current search input
guint input_pos; //!< Cursor position within input
gboolean input_confirmed; //!< Input has been confirmed
gchar * search_label; //!< Text of the "Search" label
GArray * input; //!< The current search input
guint input_pos; //!< Cursor position within input
gboolean input_confirmed; //!< Input has been confirmed
gfloat division; //!< Position of the division column
gfloat division; //!< Position of the division column
};
@ -232,6 +297,8 @@ app_init (Application *self, const gchar *filename)
exit (EXIT_FAILURE);
}
self->terminal_type = get_terminal_type ();
self->top_position = 0;
self->top_offset = 0;
self->selected = 0;
@ -584,17 +651,49 @@ app_search_for_entry (Application *self)
app_redraw_view (self);
}
#define SAVE_CURSOR \
int last_x, last_y; \
getyx (stdscr, last_y, last_x);
#define RESTORE_CURSOR \
move (last_y, last_x); \
refresh ();
/** Process input above KEY_MAX. */
static gboolean
app_process_extra_code (Application *self, CursesEvent *event)
{
SAVE_CURSOR
switch (translate_extra_keycode (event->code, self->terminal_type))
{
case KEY_CTRL_UP:
app_one_entry_up (self);
RESTORE_CURSOR
break;
case KEY_CTRL_DOWN:
app_one_entry_down (self);
RESTORE_CURSOR
break;
case KEY_ALT_LEFT:
self->division = (app_get_left_column_width (self) - 1.) / COLS;
app_redraw_view (self);
RESTORE_CURSOR
break;
case KEY_ALT_RIGHT:
self->division = (app_get_left_column_width (self) + 1.) / COLS;
app_redraw_view (self);
RESTORE_CURSOR
break;
}
return TRUE;
}
/** Process input that's not a character. */
static gboolean
app_process_nonchar_code (Application *self, CursesEvent *event)
{
int last_x, last_y;
getyx (stdscr, last_y, last_x);
#define RESTORE_CURSOR \
move (last_y, last_x); \
refresh ();
SAVE_CURSOR
switch (event->code)
{
case KEY_RESIZE:
@ -627,26 +726,6 @@ app_process_nonchar_code (Application *self, CursesEvent *event)
}
break;
case KEY_CTRL_UP:
app_one_entry_up (self);
RESTORE_CURSOR
break;
case KEY_CTRL_DOWN:
app_one_entry_down (self);
RESTORE_CURSOR
break;
case KEY_ALT_LEFT:
self->division = (app_get_left_column_width (self) - 1.) / COLS;
app_redraw_view (self);
RESTORE_CURSOR
break;
case KEY_ALT_RIGHT:
self->division = (app_get_left_column_width (self) + 1.) / COLS;
app_redraw_view (self);
RESTORE_CURSOR
break;
case KEY_UP:
if (self->selected > 0)
{
@ -717,6 +796,9 @@ app_process_nonchar_code (Application *self, CursesEvent *event)
app_redraw_top (self);
}
break;
default:
return app_process_extra_code (self, event);
}
return TRUE;
}
@ -741,6 +823,14 @@ app_process_curses_event (Application *self, CursesEvent *event)
clear ();
app_redraw (self);
break;
case KEY_STX: // Ctrl-B -- back
case KEY_ACK: // Ctrl-F -- forward
case KEY_DLE: // Ctrl-P -- previous
case KEY_SO: // Ctrl-N -- next
// TODO map this to something useful
break;
case KEY_SOH: // Ctrl-A -- move to the start of line
self->input_pos = 0;
app_redraw_top (self);